Affiliation:
Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America

X

Victor C. W. Tsang,

Affiliation:
Georgia State University, Atlanta, Georgia, United States of America

X

Robert H. Gilman,

Affiliations:
Department of Microbiology, School of Sciences, Universidad Peruana Cayetano Heredia, Lima, Peru,
Department of International Health, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland, United States of America